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Content introduction: This book tells the story of Gu Shuchen who joined a spy organization as a boy and discovered a shocking secret while carrying out a difficult mission... He has since been involved in the temptation of a huge money economy and the entanglements of complex interpersonal relationships... He lives in betrayal, precarious relationships between family, friendship, and love; bloodthirsty killings, and restricted areas of various mysterious organizations; many years later, M was poisoned and betrayed by his friends, and the mysterious veil was unveiled... A long wait, a solemn promise, who have I failed in this life? Where will her heart go...